EP2267732A3 - Rare earth permanent magnet - Google Patents

Rare earth permanent magnet Download PDF

Info

Publication number
EP2267732A3
EP2267732A3 EP10009421A EP10009421A EP2267732A3 EP 2267732 A3 EP2267732 A3 EP 2267732A3 EP 10009421 A EP10009421 A EP 10009421A EP 10009421 A EP10009421 A EP 10009421A EP 2267732 A3 EP2267732 A3 EP 2267732A3
Authority
EP
European Patent Office
Prior art keywords
rare earth
permanent magnet
earth permanent
concentration
magnet body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10009421A
Other languages
German (de)
French (fr)
Other versions
EP2267732A2 (en
EP2267732B1 (en
Inventor
Hajime Nakamura
Koichi Hirota
Masanobu Shimao
Takehisa Minowa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Publication of EP2267732A2 publication Critical patent/EP2267732A2/en
Publication of EP2267732A3 publication Critical patent/EP2267732A3/en
Application granted granted Critical
Publication of EP2267732B1 publication Critical patent/EP2267732B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
    • H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0293—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • B60K2015/0458—Details of the tank inlet
    • B60K2015/0493—Means for checking absence or presence of closure cap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/04—Tank inlets
    • B60K15/05—Inlet covers
    • B60K2015/0592—Inlet covers with storage means for the cap
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047—Alloys characterised by their composition
    • H01F1/053—Alloys characterised by their composition containing rare earth metals
    • H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/058—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0266—Moulding; Pressing

Abstract

A rare earth permanent magnet is in the form of a sintered magnet body having a composition R1 aR2 bTcAdFeOfMg wherein F and R2 are distributed such that their concentration increases on the average from the center toward the surface of the magnet body, and grain boundaries having a concentration of R2/(R1+R2) which is on the average higher than the concentration of R2/(R1+R2) contained in primary phase grains of (R1,R2)2T14A tetragonal system form a three-dimensional network structure which is continuous from the magnet body surface to a depth of at least 10 µm. The invention provides R-Fe-B sintered magnets which exhibit a high coercive force.
EP10009421.8A 2005-03-23 2006-02-01 Rare earth permanent magnet Active EP2267732B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005084213 2005-03-23
EP06250543.3A EP1705669B1 (en) 2005-03-23 2006-02-01 Rare earth permanent magnet

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP06250543.3A Division-Into EP1705669B1 (en) 2005-03-23 2006-02-01 Rare earth permanent magnet
EP06250543.3A Division EP1705669B1 (en) 2005-03-23 2006-02-01 Rare earth permanent magnet
EP06250543.3 Division 2006-02-01

Publications (3)

Publication Number Publication Date
EP2267732A2 EP2267732A2 (en) 2010-12-29
EP2267732A3 true EP2267732A3 (en) 2011-06-22
EP2267732B1 EP2267732B1 (en) 2014-06-25

Family

ID=36607265

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06250543.3A Active EP1705669B1 (en) 2005-03-23 2006-02-01 Rare earth permanent magnet
EP10009421.8A Active EP2267732B1 (en) 2005-03-23 2006-02-01 Rare earth permanent magnet

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06250543.3A Active EP1705669B1 (en) 2005-03-23 2006-02-01 Rare earth permanent magnet

Country Status (8)

Country Link
US (1) US7488394B2 (en)
EP (2) EP1705669B1 (en)
KR (1) KR101062229B1 (en)
CN (1) CN100520992C (en)
BR (1) BRPI0601890B1 (en)
MY (1) MY142024A (en)
RU (1) RU2377681C2 (en)
TW (1) TWI364765B (en)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8211327B2 (en) 2004-10-19 2012-07-03 Shin-Etsu Chemical Co., Ltd. Preparation of rare earth permanent magnet material
US7559996B2 (en) 2005-07-22 2009-07-14 Shin-Etsu Chemical Co., Ltd. Rare earth permanent magnet, making method, and permanent magnet rotary machine
JP4656323B2 (en) * 2006-04-14 2011-03-23 信越化学工業株式会社 Method for producing rare earth permanent magnet material
US7955443B2 (en) * 2006-04-14 2011-06-07 Shin-Etsu Chemical Co., Ltd. Method for preparing rare earth permanent magnet material
JP4605396B2 (en) * 2006-04-14 2011-01-05 信越化学工業株式会社 Method for producing rare earth permanent magnet material
JP4753030B2 (en) * 2006-04-14 2011-08-17 信越化学工業株式会社 Method for producing rare earth permanent magnet material
JP4737431B2 (en) 2006-08-30 2011-08-03 信越化学工業株式会社 Permanent magnet rotating machine
JP4840606B2 (en) * 2006-11-17 2011-12-21 信越化学工業株式会社 Rare earth permanent magnet manufacturing method
WO2008123251A1 (en) * 2007-03-27 2008-10-16 Hitachi Metals, Ltd. Permanent magnet type rotator and process for producing the same
WO2008139559A1 (en) * 2007-05-02 2008-11-20 Hitachi Metals, Ltd. R-t-b sintered magnet
KR101378089B1 (en) * 2007-05-02 2014-03-27 히다찌긴조꾸가부시끼가이사 R-t-b sintered magnet
CN101682222A (en) * 2007-05-28 2010-03-24 丰田自动车株式会社 rotor for magnet-embedded motor and magnet-embedded motor
JP4672030B2 (en) * 2008-01-31 2011-04-20 日立オートモティブシステムズ株式会社 Sintered magnet and rotating machine using the same
JP2010022147A (en) * 2008-07-11 2010-01-28 Hitachi Ltd Sintered magnet motor
JP5472444B2 (en) 2010-03-04 2014-04-16 Ｔｄｋ株式会社 Rare earth sintered magnet and motor
CN102822912B (en) 2010-03-30 2015-07-22 Tdk株式会社 Rare earth sintered magnet, method for producing same, motor and automobile
WO2012099188A1 (en) * 2011-01-19 2012-07-26 日立金属株式会社 R-t-b sintered magnet
KR101243347B1 (en) * 2011-01-25 2013-03-13 한양대학교 산학협력단 R-Fe-B Sintered magnet with enhancing mechanical property and fabrication method thereof
WO2012102497A2 (en) * 2011-01-25 2012-08-02 Industry-University Cooperation Foundation, Hanyang University R-fe-b sintered magnet with enhanced mechanical properties and method for producing the same
JP5868500B2 (en) * 2012-05-30 2016-02-24 株式会社日立製作所 Sintered magnet and manufacturing method thereof
DE102012221448A1 (en) * 2012-11-23 2014-06-12 Hochschule Aalen Magnetic material and process for its production
WO2014148353A1 (en) * 2013-03-18 2014-09-25 インターメタリックス株式会社 RFeB-BASED MAGNET PRODUCTION METHOD, RFeB-BASED MAGNET, AND COATING MATERIAL FOR GRAIN BOUNDARY DIFFUSION PROCESS
CN103258633B (en) * 2013-05-30 2015-10-28 烟台正海磁性材料股份有限公司 A kind of preparation method of R-Fe-B based sintered magnet
CN104715877B (en) * 2013-12-16 2019-08-27 北京中科三环高技术股份有限公司 A kind of rare-earth permanent magnet and its manufacturing method
KR101534717B1 (en) * 2013-12-31 2015-07-24 현대자동차 주식회사 Process for preparing rare earth magnets
GB2540150B (en) 2015-07-06 2020-01-08 Dyson Technology Ltd Rare earth magnet with Dysprosium treatment
GB2540149B (en) * 2015-07-06 2019-10-02 Dyson Technology Ltd Magnet
CN106328367B (en) * 2016-08-31 2017-11-24 烟台正海磁性材料股份有限公司 A kind of preparation method of R Fe B based sintered magnets
CN109256250B (en) * 2017-07-13 2021-07-13 北京中科三环高技术股份有限公司 Ce-containing rare earth permanent magnet and preparation method thereof
JP7196514B2 (en) * 2018-10-04 2022-12-27 信越化学工業株式会社 rare earth sintered magnet
WO2020155113A1 (en) * 2019-02-01 2020-08-06 天津三环乐喜新材料有限公司 Preparation method for rare earth diffused magnet and rare earth diffused magnet
CN112447350B (en) * 2019-08-29 2024-05-07 比亚迪股份有限公司 Rare earth permanent magnet and preparation method thereof
CN111243807B (en) * 2020-02-26 2021-08-27 厦门钨业股份有限公司 Neodymium-iron-boron magnet material, raw material composition, preparation method and application

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06244011A (en) * 1992-12-26 1994-09-02 Sumitomo Special Metals Co Ltd Corrosion-resistant rare earth magnet and manufacture thereof
WO2004114333A1 (en) * 2003-06-18 2004-12-29 Japan Science And Technology Agency Rare earth - iron - boron based magnet and method for production thereof
EP1830371A1 (en) * 2004-10-19 2007-09-05 Shin-Etsu Chemical Co., Ltd. Method for producing rare earth permanent magnet material
EP1843360A1 (en) * 2004-12-16 2007-10-10 Japan Science and Technology Agency Nd-Fe-B MAGNET WITH MODIFIED GRAIN BOUNDARY AND PROCESS FOR PRODUCING THE SAME

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5466308A (en) * 1982-08-21 1995-11-14 Sumitomo Special Metals Co. Ltd. Magnetic precursor materials for making permanent magnets
JPS61195954A (en) * 1985-02-26 1986-08-30 Santoku Kinzoku Kogyo Kk Permanent magnet alloy
DE3740157A1 (en) * 1987-11-26 1989-06-08 Max Planck Gesellschaft SINTER MAGNET BASED ON FE-ND-B
JPH01251704A (en) * 1988-03-31 1989-10-06 Tokin Corp Rare earth permanent magnet with excellent oxidation resistance
JP3009687B2 (en) * 1989-12-15 2000-02-14 住友特殊金属株式会社 Manufacturing method of high corrosion resistant sintered permanent magnet material
JPH04184901A (en) * 1990-11-20 1992-07-01 Shin Etsu Chem Co Ltd Rare earth iron based permanent magnet and its manufacture
JP2844269B2 (en) * 1991-04-26 1999-01-06 住友特殊金属株式会社 Corrosion resistant permanent magnet and method for producing the same
JP3143156B2 (en) * 1991-07-12 2001-03-07 信越化学工業株式会社 Manufacturing method of rare earth permanent magnet
JPH0531807A (en) * 1991-07-31 1993-02-09 Central Glass Co Ltd Sticking structure and method of protective film
FR2700720B1 (en) * 1993-01-22 1995-05-05 Aimants Ugimag Sa Process for the protection of densified magnetic powders and permanent magnets type Fe Nd B against oxidation and atmospheric corrosion.
US5858124A (en) * 1995-10-30 1999-01-12 Hitachi Metals, Ltd. Rare earth magnet of high electrical resistance and production method thereof
DE69916764T2 (en) * 1998-12-15 2005-03-31 Shin-Etsu Chemical Co., Ltd. Rare earth / iron / boron based alloy for permanent magnet
JP3278647B2 (en) * 1999-01-27 2002-04-30 住友特殊金属株式会社 Rare earth bonded magnet
US6302939B1 (en) * 1999-02-01 2001-10-16 Magnequench International, Inc. Rare earth permanent magnet and method for making same
KR100853089B1 (en) * 2001-07-10 2008-08-19 신에쓰 가가꾸 고교 가부시끼가이샤 Remelting Process of Rare Earth Magnet Scrap and/or Sludge, and Magnet-Forming Alloy and Sintered Rare Earth Magnet
JP2003282312A (en) 2002-03-22 2003-10-03 Inter Metallics Kk R-Fe-(B,C) SINTERED MAGNET IMPROVED IN MAGNETIZABILITY AND ITS MANUFACTURING METHOD
US7255752B2 (en) * 2003-03-28 2007-08-14 Tdk Corporation Method for manufacturing R-T-B system rare earth permanent magnet
JP3897724B2 (en) 2003-03-31 2007-03-28 独立行政法人科学技術振興機構 Manufacturing method of micro, high performance sintered rare earth magnets for micro products
CN1934283B (en) * 2004-06-22 2011-07-27 信越化学工业株式会社 R-Fe-B-based rare earth permanent magnet material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06244011A (en) * 1992-12-26 1994-09-02 Sumitomo Special Metals Co Ltd Corrosion-resistant rare earth magnet and manufacture thereof
WO2004114333A1 (en) * 2003-06-18 2004-12-29 Japan Science And Technology Agency Rare earth - iron - boron based magnet and method for production thereof
EP1643513A1 (en) * 2003-06-18 2006-04-05 Japan Science and Technology Agency Rare earth - iron - boron based magnet and method for production thereof
EP1830371A1 (en) * 2004-10-19 2007-09-05 Shin-Etsu Chemical Co., Ltd. Method for producing rare earth permanent magnet material
EP1843360A1 (en) * 2004-12-16 2007-10-10 Japan Science and Technology Agency Nd-Fe-B MAGNET WITH MODIFIED GRAIN BOUNDARY AND PROCESS FOR PRODUCING THE SAME

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
H NAKAMURA, K HIROTA M SHIMAO T MINOWA M HONSHIMA: "Magnetic Properties of Extremely Small Nd-Fe-B Sintered Magnets", IEEE TRANSACTIONS ON MAGNETICS, vol. 41, no. 10, October 2005 (2005-10-01), pages 3844 - 3846, XP002463460, DOI: 10.1109/TMAG.2005.854874 *
K HIROTA H NAKAMURA T MINOWA M HONSHIMA: "Coercivity Enhancement by Grain Boundary Diffusion Process to Nd-Fe-B Sintered Magnets", IEEE TRANSACTIONS ON MAGNETICS, vol. 42, no. 10, October 2006 (2006-10-01), pages 2909 - 2911, XP002463459, DOI: 10.1109/TMAG.2006.879906 *

Also Published As

Publication number Publication date
CN1838343A (en) 2006-09-27
EP2267732A2 (en) 2010-12-29
KR20060102483A (en) 2006-09-27
EP1705669B1 (en) 2014-04-23
MY142024A (en) 2010-08-16
KR101062229B1 (en) 2011-09-05
BRPI0601890A (en) 2006-12-05
CN100520992C (en) 2009-07-29
RU2377681C2 (en) 2009-12-27
BRPI0601890B1 (en) 2018-01-16
EP1705669A2 (en) 2006-09-27
EP1705669A3 (en) 2008-02-13
US7488394B2 (en) 2009-02-10
RU2006103678A (en) 2007-08-20
EP2267732B1 (en) 2014-06-25
TWI364765B (en) 2012-05-21
US20060213584A1 (en) 2006-09-28
TW200643995A (en) 2006-12-16

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